Search (60 results, page 2 of 3)

Egghe, L.: Special features of the author - publication relationship and a new explanation of Lotka's law based on convolution theory (1994) 0.01

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Egghe, L.: Empirical and combinatorial study of country occurrences in multi-authored papers (2006) 0.01

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Source: Information - Wissenschaft und Praxis. 57(2006) H.8, S.427-432

Egghe, L.: ¬A good normalized impact and concentration measure (2014) 0.01

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Egghe, L.; Liang, L.; Rousseau, R.: Fundamental properties of rhythm sequences (2008) 0.01

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Egghe, L.; Bornmann, L.: Fallout and miss in journal peer review (2013) 0.01

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Egghe, L.: Existence theorem of the quadruple (P, R, F, M) : precision, recall, fallout and miss (2007) 0.01
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Abstract

In an earlier paper [Egghe, L. (2004). A universal method of information retrieval evaluation: the "missing" link M and the universal IR surface. Information Processing and Management, 40, 21-30] we showed that, given an IR system, and if P denotes precision, R recall, F fallout and M miss (re-introduced in the paper mentioned above), we have the following relationship between P, R, F and M: P/(1-P)*(1-R)/R*F/(1-F)*(1-M)/M = 1. In this paper we prove the (more difficult) converse: given any four rational numbers in the interval ]0, 1[ satisfying the above equation, then there exists an IR system such that these four numbers (in any order) are the precision, recall, fallout and miss of this IR system. As a consequence we show that any three rational numbers in ]0, 1[ represent any three measures taken from precision, recall, fallout and miss of a certain IR system. We also show that this result is also true for two numbers instead of three.

Egghe, L.; Leydesdorff, L.: ¬The relation between Pearson's correlation coefficient r and Salton's cosine measure (2009) 0.01

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Egghe, L.: ¬The amount of actions needed for shelving and reshelving (1996) 0.01

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Egghe, L.; Rousseau, R.: Duality in information retrieval and the hypegeometric distribution (1997) 0.01

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Egghe, L.: On the law of Zipf-Mandelbrot for multi-word phrases (1999) 0.01

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Egghe, L.; Rousseau, R.: ¬A theoretical study of recall and precision using a topological approach to information retrieval (1998) 0.01

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Egghe, L.; Rousseau, R.: ¬The influence of publication delays on the observed aging distribution of scientific literature (2000) 0.01

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Egghe, L.: Mathematical theories of citation (1998) 0.01

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Egghe, L.: On the relation between the association strength and other similarity measures (2010) 0.01

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Egghe, L.: Informetric explanation of some Leiden Ranking graphs (2014) 0.01

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Egghe, L.; Rousseau, R.: Topological aspects of information retrieval (1998) 0.01
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Abstract

Let (DS, DQ, sim) be a retrieval system consisting of a document space DS, a query space QS, and a function sim, expressing the similarity between a document and a query. Following D.M. Everett and S.C. Cater (1992), we introduce topologies on the document space. These topologies are generated by the similarity function sim and the query space QS. 3 topologies will be studied: the retrieval topology, the similarity topology and the (pseudo-)metric one. It is shown that the retrieval topology is the coarsest of the three, while the (pseudo-)metric is the strongest. These 3 topologies are generally different, reflecting distinct topological aspects of information retrieval. We present necessary and sufficient conditions for these topological aspects to be equal

Egghe, L.: Sampling and concentration values of incomplete bibliographies (2002) 0.01

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Egghe, L.: Vector retrieval, fuzzy retrieval and the universal fuzzy IR surface for IR evaluation (2004) 0.01

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Egghe, L.; Rousseau, R.; Rousseau, S.: TOP-curves (2007) 0.01

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Egghe, L.; Rousseau, R.: Introduction to informetrics : quantitative methods in library, documentation and information science (1990) 0.01

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